Which describes a proper CAC implementation in an H.323 network that uses directory gatekeepers?
A.
The bandwidth commands for each zone that is registered with the directory gatekeeper are included in the directory gatekeeper configuration.
B.
The zone gatekeepers maintain the bandwidth commands and the directory gatekeeper is only responsible for dial plan resolution.
C.
The zone gatekeeper negotiates bandwidth requirements with the target zone gatekeeper by means of an LRQ message forwarded by the directory gatekeeper.
D.
The directory gatekeeper controls call bandwidth usage between the zones.